feat: reply with HttpStatus 400 and SAX messsage on metadata parsing exception

AoU-Common/src/main/java/ch/unige/aou/controlleradvice/AoUControllerAdvice.java

+package ch.unige.aou.controlleradvice;
+
+import static ch.unige.solidify.controller.SolidifyControllerAdvice.StackTraceDisplay.WITH_STACK_TRACE;
+
+import javax.servlet.http.HttpServletRequest;
+
+import org.springframework.boot.web.servlet.error.ErrorAttributes;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+
+import ch.unige.solidify.controller.SolidifyControllerAdvice;
+import ch.unige.solidify.repository.SolidifyError;
+import ch.unige.solidify.service.MessageService;
+
+import ch.unige.aou.exception.AoUMetadataParseException;
+
+@ControllerAdvice
+public class AoUControllerAdvice extends SolidifyControllerAdvice {
+
+  public AoUControllerAdvice(ErrorAttributes errorAttributes, MessageService messageService) {
+    super(errorAttributes, messageService);
+  }
+
+  @ExceptionHandler(AoUMetadataParseException.class)
+  public ResponseEntity<SolidifyError> handleException(AoUMetadataParseException exception, HttpServletRequest request) {
+    String message = "";
+    if(exception.getCause() != null) {
+      message = exception.getCause().getMessage();
+    }
+    return this.buildResponse(exception, request, message, HttpStatus.BAD_REQUEST, WITH_STACK_TRACE);
+  }
+}